Microsoft has your desktop data which is probably more personal. Outlook.. your local searches queries.

Microsoft historically works closely with law enforcement. Google works with law enforcement but also tries to limit their access.

Google gives free products away and uses your data to sell to you stuff. Microsoft takes your data and makes products for law enforcement.

Google seems nosey neighbour who will sell photos of you to a newspaper. Microsoft seems like the neighbour who spys on everything you do and would call the fbi.